Improvement of surface properties of metal doped-CeO<inf>2</inf> nanospindle catalysts for direct synthesis of dimethyl carbonate from CO<inf>2</inf> and methanol
Issued Date
2023-06-01
Resource Type
eISSN
22133437
Scopus ID
2-s2.0-85151471657
Journal Title
Journal of Environmental Chemical Engineering
Volume
11
Issue
3
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Environmental Chemical Engineering Vol.11 No.3 (2023)
Suggested Citation
Seeharaj P., Saenman T., Phiwhom T., Muangsuwan C., Srinives S., Kim-Lohsoontorn P. Improvement of surface properties of metal doped-CeO<inf>2</inf> nanospindle catalysts for direct synthesis of dimethyl carbonate from CO<inf>2</inf> and methanol. Journal of Environmental Chemical Engineering Vol.11 No.3 (2023). doi:10.1016/j.jece.2023.109813 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/81370
Title
Improvement of surface properties of metal doped-CeO<inf>2</inf> nanospindle catalysts for direct synthesis of dimethyl carbonate from CO<inf>2</inf> and methanol
Author's Affiliation
Other Contributor(s)
Abstract
To utilize carbon dioxide (CO2) which is the main greenhouse gas, this study developed effective metal doped-CeO2 nanospindle catalysts for conversion of CO2 and methanol into dimethyl carbonate (DMC). Ce0.9M0.1O2 nanospindles (where M is a transition metal, i.e., Zr, Fe, Cu and Co) were prepared by a template-free hydrothermal method. The substitution of different valence and size cations, including Zr4+, Fe3+, Cu2+ and Co2+, for Ce4+ sites in the fluorite CeO2 lattice induced the defect formation of surface-active sites of exposed Ce3+ and oxygen vacancies through the charge compensation and redox pair reactions. Ce0.9Fe0.1O2 solid solution with well-preserved spindle shaped morphology showed the highest catalytic performance by giving DMC yield at 3.56 mmol.gcat−1 with 100% DMC selectivity. The improvement of catalytic activity was attributed to the higher proportion of surface defect sites and variation of acid-base properties caused by the integration of Fe dopants into CeO2 ionic system.